A customer has deployed a FlexPod Datacenter with Red Hat Enterprise Linux OpenStack Platform. The Cinder storage volumes that are attached to the Nova instances are not available.

Based on the terms of the cooperative support model, which three companies would the customer use to open a support case? (Choose three.)

A. Cisco

B. VMware
C. Microsoft

D. NetApp

E. Red Hat

Reference: https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/UCS_CVDs/flexpod_openstack_osp6_design.html